Can't open Java Plug-in 1.3.1_01 control panel

Click on the Java Plug-in icon, my cursor turns into an hour glass for a few seconds, a javaw.exe process starts on my Windows2000 Pro Task Manager, but the Java Control Panel never appears.
Also click on other java icons and the same thing happens (a javaw.exe process starts but not window appears).
Same thing happens with 1.4.1_01.
Any ideas on what could cause this?
Thanks.

Any ideas on what could cause this?Not really, but try uninstalling and reinstalling the JRE.

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Using JRE version 1.4.1_01 Java HotSpot(TM) Client VM
Modality popped
User selected: 0
Optional package download granted by user, download from http://xxxxxxxxxxxxxxxxxxxxxx/jai_windows-i586.jar
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Connecting http://xxxxxxxxxxxxxxxxxx/jai_windows-i586.jar with cookie "JIGSAW-SESSION-ID=J986902630-19"
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Loading certificates from JPI session certificate store
Loaded certificates from JPI session certificate store
Checking if certificate is in JPI permanent certificate store
Checking if certificate is in JPI session certificate store
Checking if certificate is in Root CA certificate store
Checking if certificate is in Root CA certificate store
Checking if certificate is in Root CA certificate store
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Can't open Java Plug-in 1.3.1_01 control panel

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